CN207967925U - A kind of lightning protection circuit of alarm control system - Google Patents
A kind of lightning protection circuit of alarm control system Download PDFInfo
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- CN207967925U CN207967925U CN201820393971.0U CN201820393971U CN207967925U CN 207967925 U CN207967925 U CN 207967925U CN 201820393971 U CN201820393971 U CN 201820393971U CN 207967925 U CN207967925 U CN 207967925U
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Abstract
The utility model discloses a kind of lightning protection circuit of alarm control system.In the lightning protection circuit, the input terminal of the first lightning wave receiving terminal, the first inductance and data input port is sequentially connected in series；Second lightning wave receiving terminal, first resistor, the second inductance and data input port input terminal be sequentially connected in series；Third lightning wave receiving terminal, second resistance, third inductance and data output input terminal be sequentially connected in series；First capacitance and varistor are both connected between the input terminal of positive pole interface and the input terminal of power cathode interface；The cathode of first transition diode is connected to the input terminal of data input port, and anode is connected to the input terminal of power cathode interface；The cathode of second transition diode is connected to the input terminal of data output, and anode is connected to the input terminal of power cathode interface；The input terminal of power cathode interface is directly connected with the 4th lightning wave receiving terminal.The lightning protection circuit can prevent alarm and control keyboard from being destroyed by lightning wave.
Description
Technical field
The utility model is related to anti-thunder technical fields, more particularly to a kind of lightning protection circuit of alarm control system.
Background technology
Honeywell (Honeywell) VISTA series alarm and its control keyboard are because its reliability is in security protection industry
It is widely used, the interface circuit of the alarm and its control keyboard includes that positive pole interface, power cathode interface, data are defeated
Entrance and data output, but the equipment interface design protection Shortcomings, the connecting line between keyboard and alarm host machine
The lightning wave of road induction is easy to lead to the type damage of facilities, and to the safe and reliable operation of alarm system, there are huge
It threatens.
Invention content
The purpose of this utility model is to provide a kind of lightning protection circuit of alarm control system, to prevent alarm and
Its control keyboard is destroyed by lightning wave.
To achieve the above object, the utility model provides following scheme：
A kind of lightning protection circuit of alarm control system, the positive pole for being connected to alarm and its control keyboard connect
Mouth, power cathode interface, data input port and data output；The lightning protection circuit of the alarm control system includes：First
Inductance, the second inductance, third inductance, first resistor, second resistance, the first capacitance, the first transition diode, two pole of the second transition
Pipe and varistor；
One end of first inductance is connected to the first lightning wave receiving terminal, and the other end of first inductance is connected to electricity
The input terminal of source anode interface；One end of the first resistor is connected to the second lightning wave receiving terminal, the first resistor it is another
One end is connected to one end of second inductance, and the other end of second inductance is connected to the input terminal of data input port；Institute
The one end for stating second resistance is connected to third lightning wave receiving terminal, and the other end of the second resistance is connected to the third inductance
One end, the other end of the third inductance is connected to the input terminal of data output；One end of first capacitance is connected to
The input terminal of the positive pole interface, the other end are connected to the input terminal of the power cathode interface；The varistor
One end is connected to the input terminal of the positive pole interface, and the other end is connected to the input terminal of the power cathode interface；It is described
The cathode of first transition diode is connected to the input terminal of the data input port, and the other end is connected to the power cathode interface
Input terminal；The cathode of the second transition diode is connected to the input terminal of the data output, and the other end is connected to institute
State the input terminal of power cathode interface；The input terminal of the power cathode interface is directly connected with the 4th lightning wave receiving terminal.
Optionally, the inductance ratings of first inductance, the second inductance and third inductance are 220mH.
Optionally, the rated resistance of the first resistor and the second resistance is 100 Ω, and rated power is 2W.
Optionally, the rated capacity of first capacitance is 0.33 μ F.
Optionally, the model of the first transition diode and the second transition diode is 1.5KE12A.
Optionally, the model 10D180K of the varistor.
According to specific embodiment provided by the utility model, the utility model discloses following technique effects：This practicality is new
The voltage that type is lowered into the lightning wave of positive pole interface by the way that the first inductance, the first capacitance and varistor is arranged, leads to
The voltage that first resistor, the second inductance and the first transition diode are lowered into the lightning wave of data input pin is crossed, passes through
Two resistance, third inductance and the second transition diode are lowered into the voltage of the lightning wave of data output end, to realization pair
The lightning protection of alarm and its control keyboard prevents alarm and its control keyboard from being destroyed by lightning wave.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without having to pay creative labor, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the circuit structure diagram of the lightning protection circuit embodiment of the utility model alarm control system.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, below in conjunction with the accompanying drawings and have
Body embodiment is described in further detail the utility model.
Fig. 1 is the circuit structure diagram of the lightning protection circuit embodiment of the utility model alarm control system.
Referring to Fig. 1, the lightning protection circuit of the alarm control system is applied to HoneywellVISTA series alarm host machines
And control keyboard, it is connected on HoneywellVISTA series alarm host machine and control keyboard interface circuit, the interface circuit packet
Include positive pole interface, power cathode interface, data input port and data output.A part of structure of the interface circuit includes
First diode D1, second have electrode capacitance C2, third capacitance C3, third transition diode TVS3, the 4th transition diode TVS4,
3rd resistor R3 and the 4th resistance R4.The wherein anode of the output end of positive pole interface and the first diode D1 and third transition
The cathode of diode TVS3 connects, and the cathode of the first diode D1, which is connected to second, the anode and third capacitance C3 of electrode capacitance C2
One end, power cathode interface be connected to the anode of third transition diode TVS3, second have the cathode of electrode capacitance C2, third electricity
Hold the anode of the other end and the 4th transition diode TVS4 of C3；The output end of data output is connected to two pole of the 4th transition
One end of the cathode of pipe TVS4 and the 4th resistance R4；The output end of data input port is connected to one end of 3rd resistor R3；First
The cathode of diode D1, the other end of 3rd resistor R3, the other end of the 4th resistance R4 and power cathode are all connected to interface electricity
The other parts on road.
First diode D1, second are forming power supply just by electrode capacitance C2, third capacitance C3 and third transition diode TVS3
Pole inputs and protection circuit, and in the case of not external lightning protection device, third transition diode TVS3 is in the impact for meeting with lightning wave
It is lower to be easy to breakdown, it cannot be worked normally so as to cause equipment.
3rd resistor R3 is directly connected with processor (not shown), if the not external lightning protection device of data input port, outside line
The high pressure lightning wave that road feel is answered can be directly impinging processor, keep processor impaired.
4th transition diode TVS4 and the 4th resistance R4 form simple data output protection circuit, if data output
Not external lightning protection device, then the 4th transition diode TVS4 is easy to breakdown under the impact for meeting with lightning wave, so as to cause setting
It is standby to be worked normally.
In order to realize the protection to third transition diode TVS3, the 4th transition diode TVS4 and processor, invent
The lightning protection circuit of the lightning protection circuit of the alarm control system of the application, the alarm control system includes：First inductance
L1, the second inductance L2, third inductance L3, first resistor R1, second resistance R2, the first capacitance C1, the first transition diode TVS1,
Second transition diode TVS2 and varistor RV1；
One end of the first inductance L1 is connected to the first lightning wave receiving terminal, the other end connection of the first inductance L1
To the input terminal of positive pole interface；One end of the first resistor R1 is connected to the second lightning wave receiving terminal, first electricity
The other end of resistance R1 is connected to one end of the second inductance L2, and the other end of the second inductance L2 is connected to data input port
Input terminal；One end of the second resistance R2 is connected to third lightning wave receiving terminal, and the other end of the second resistance R2 connects
It is connected to one end of the third inductance L3, the other end of the third inductance L3 is connected to the input terminal of data output；It is described
One end of first capacitance C1 is connected to the input terminal of the positive pole interface, and the other end is connected to the power cathode interface
Input terminal；One end of the varistor RV1 is connected to the input terminal of the positive pole interface, and the other end is connected to the electricity
The input terminal of source cathode interface；The cathode of the first transition diode TVS1 is connected to the input terminal of the data input port,
The other end is connected to the input terminal of the power cathode interface；The cathode of the second transition diode TVS2 is connected to the number
According to the input terminal of delivery outlet, the other end is connected to the input terminal of the power cathode interface；The input of the power cathode interface
End is directly connected with the 4th lightning wave receiving terminal.
The inductance ratings of the first inductance L1, the second inductance L2 and third inductance L3 are 220mH.
The first resistor R1 and second resistance R2 is power resistor, rated resistance be 100 Ω, it is specified
Power is 2W.
The rated capacity of the first capacitance C1 is 0.33 μ F.
The model of the first transition diode TVS1 and the second transition diode TVS2 are 1.5KE12A.
The model 10D180K of the varistor RV1.
In the utility model, the first lightning wave receiving terminal, the first inductance L1, the first capacitance C1 and varistor RV1 are constituted
First line, first line are used to carry out lightning protection to positive pole interface.If first line is by lightning surge intrusion, thunder and lightning
Wave enters from the first lightning wave receiving terminal, when by the first inductance L1, based on the principle that the electric current for flowing through inductance cannot be mutated, thunder
The electric current of electric wave can be clamped down on, and principle and varistor RV1 absorbing clamps that the voltage at capacitance both ends cannot be mutated are then based on
The voltage of mechanism processed, lightning wave can significantly be weakened so that into equipment remaining thunder and lightning wave voltage in safe model
In enclosing.
Second lightning wave receiving terminal, first resistor R1, the second inductance L2 and the first transition diode TVS1 constitute the second line
Road, the second circuit are used to carry out lightning protection to Data Input Interface.If the second circuit, by lightning surge intrusion, lightning wave is from
Two lightning wave receiving terminals enter, when by first resistor R1 and the second inductance L2, thunder and lightning wave energy by the power resistor absorb and
Weaken, the voltage of lightning wave is clamped down on by the first transition diode TVS1, to drop in safe range.
Third lightning wave receiving terminal, second resistance R2, third inductance L3 and the second transition diode TVS2 constitute third line
Road, tertiary circuit are used to carry out lightning protection to data output interface.If tertiary circuit, by lightning surge intrusion, lightning wave is from
Three lightning wave receiving terminals enter, when by second resistance R2 and third inductance L3, thunder and lightning wave energy by the power resistor absorb and
Weaken, the voltage of lightning wave is clamped down on by the second transition diode TVS2, to drop in safe range.
The utility model is being lowered into power supply just by the way that the first inductance L1, the first capacitance C1 and varistor RV1 is arranged
The voltage of the lightning wave of pole interface is lowered by first resistor R1, the second inductance L2 and the first transition diode TVS1
The voltage of the lightning wave of data input pin, by second resistance R2, third inductance L3 and the second transition diode TVS2 reduce into
Enter the voltage to the lightning wave of data output end, to realize to the lightning protection of alarm and its control keyboard, prevents from alarming
Device and its control keyboard are destroyed by lightning wave.
Specific case used herein is expounded the principles of the present invention and embodiment, above example
Explanation be merely used to help understand the method and its core concept of the utility model；Meanwhile for the general technology of this field
Personnel, according to the thought of the utility model, there will be changes in the specific implementation manner and application range.In conclusion
The content of the present specification should not be construed as a limitation of the present invention.
Claims (6)
1. a kind of lightning protection circuit of alarm control system, which is characterized in that be connected to the electricity of alarm and its control keyboard
Source anode interface, power cathode interface, data input port and data output；The lightning protection circuit packet of the alarm control system
It includes：First inductance, the second inductance, third inductance, first resistor, second resistance, the first capacitance, the first transition diode, second
Transition diode and varistor；
One end of first inductance is connected to the first lightning wave receiving terminal, and the other end of first inductance is being connected to power supply just
The input terminal of pole interface；One end of the first resistor is connected to the second lightning wave receiving terminal, the other end of the first resistor
It is connected to one end of second inductance, the other end of second inductance is connected to the input terminal of data input port；Described
One end of two resistance is connected to third lightning wave receiving terminal, and the other end of the second resistance is connected to the one of the third inductance
End, the other end of the third inductance are connected to the input terminal of data output；One end of first capacitance is connected to described
The input terminal of positive pole interface, the other end of first capacitance are connected to the input terminal of the power cathode interface；It is described
One end of varistor is connected to the input terminal of the positive pole interface, and the other end of the varistor is connected to the electricity
The input terminal of source cathode interface；The cathode of the first transition diode is connected to the input terminal of the data input port, described
The anode of first transition diode is connected to the input terminal of the power cathode interface；The cathode of the second transition diode connects
It is connected to the input terminal of the data output, the anode of the second transition diode is connected to the defeated of the power cathode interface
Enter end；The input terminal of the power cathode interface is directly connected with the 4th lightning wave receiving terminal.
2. a kind of lightning protection circuit of alarm control system according to claim 1, which is characterized in that first electricity
The inductance ratings of sense, the second inductance and third inductance are 220mH.
3. a kind of lightning protection circuit of alarm control system according to claim 1, which is characterized in that first electricity
The rated resistance of resistance and the second resistance is 100 Ω, and rated power is 2W.
4. a kind of lightning protection circuit of alarm control system according to claim 1, which is characterized in that first electricity
The rated capacity of appearance is 0.33 μ F.
5. a kind of lightning protection circuit of alarm control system according to claim 1, which is characterized in that first wink
The model for becoming diode and the second transition diode is 1.5KE12A.
6. a kind of lightning protection circuit of alarm control system according to claim 1, which is characterized in that the pressure-sensitive electricity
The model 10D180K of resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820393971.0U CN207967925U (en) | 2018-03-22 | 2018-03-22 | A kind of lightning protection circuit of alarm control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820393971.0U CN207967925U (en) | 2018-03-22 | 2018-03-22 | A kind of lightning protection circuit of alarm control system |
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| Publication Number | Publication Date |
|---|---|
| CN207967925U true CN207967925U (en) | 2018-10-12 |
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ID=63725677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820393971.0U Active CN207967925U (en) | 2018-03-22 | 2018-03-22 | A kind of lightning protection circuit of alarm control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173251A (en) * | 2018-03-22 | 2018-06-15 | 佛山市新东方电子技术工程有限公司 | A kind of lightning protection circuit of alarm control system |
-
2018
- 2018-03-22 CN CN201820393971.0U patent/CN207967925U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173251A (en) * | 2018-03-22 | 2018-06-15 | 佛山市新东方电子技术工程有限公司 | A kind of lightning protection circuit of alarm control system |
| CN108173251B (en) * | 2018-03-22 | 2023-12-01 | 佛山市新东方电子技术工程有限公司 | Lightning protection circuit of alarm control system |
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